# Problem with array

I'm having some errors while copmiling the following:

$$k_{t+1}=\left\{ \begin{array}{l} A.s.k_{t}^{\alpha}+(1-\delta).b_{t}^{P}-\delta.b_{t} \quad \text{if \frac{b_{t}+b_{t}^{P}}{(1-\epsilon).s.k_{t}^{\alpha}} < 1} \\ s.k_{t}^{\alpha}-b_{t} \quad \text{if \frac{b_{t}+b_{t}^{P}}{(1-\epsilon).s.k_{t}^{\alpha}} \geq 1} \end{array} \right.$$

## Notes:

• Not sure what the . means in your equations, but did you perhaps intend to use a \cdot?

$$k_{t+1}=\left\{ \begin{array}{l} A.s.k_{t}^{\alpha}+(1-\delta).b_{t}^{P}-\delta.b_{t} \quad \text{if \frac{b_{t}+b_{t}^{P}}{(1-\epsilon).s.k_{t}^{\alpha}} < 1} \\ s.k_{t}^{\alpha}-b_{t} \quad \text{if \frac{b_{t}+b_{t}^{P}}{(1-\epsilon).s.k_{t}^{\alpha}} \geq 1} \end{array} \right.$$
$$k_{t+1}= \begin{cases} A.s.k_{t}^{\alpha}+(1-\delta).b_{t}^{P}-\delta.b_{t} & \quad \text{if } \frac{b_{t}+b_{t}^{P}}{(1-\epsilon).s.k_{t}^{\alpha}} < 1 \\ s.k_{t}^{\alpha}-b_{t} & \quad \text{if } \frac{b_{t}+b_{t}^{P}}{(1-\epsilon).s.k_{t}^{\alpha}} \geq 1 \end{cases}$$